Web App Design

Web app design that drives
growth & user engagement

We create intuitive, user-centric designs that simplify workflows, enhance usability, and boost conversions — ensuring your web app is both functional and future-proof.

Designing products for startups backed by

phenomenon studio IN NUMBERS
98%

customer satisfaction rate

35%+

boost in conversions after redesign

60+

top-tier designers and developers on board

500M+

investments raised by our clients

Challenges

We design web apps that solve
problems,
not create them

Is your web app frustrating users with poor navigation and low engagement?

A confusing interface, slow load times, and lack of intuitive design can drive users away. We create seamless, user-centric experiences with clear navigation, smart UI patterns, and accessibility best practices to keep users engaged and encourage retention.

Are inefficient workflows slowing down productivity and frustrating your team?

Poorly structured web app can lead to wasted time, errors, and user frustration. We optimize workflows by reducing friction, streamlining interactions, and incorporating automation where needed—allowing users to complete tasks faster and more efficiently.

Struggling with low conversions and high drop-off rates?

If users abandon your web app before taking key actions, your business is losing potential revenue. We apply data-driven design strategies, psychological triggers, and A/B testing to create high-converting user journeys that guide visitors seamlessly toward sign-ups, purchases, or other critical goals.
Tailored Web app Solutions for Your Business

Industry-specific
web app solutions

01
SaaS
Scalable applications thoughtfully designed to enhance user engagement, streamline and optimize workflows, and effectively support subscription-based business models.
02
EdTech
Interactive learning platforms with student dashboards, virtual classrooms, and AI-powered personalization for better educational experiences.
03
Web3 & Blockchain
Decentralized applications (dApps) featuring secure transactions, transparent smart contracts, and intuitive user interfaces for blockchain-based projects.
04
FinTech
Financial solutions with seamless transactions, AI-driven analytics, and compliance-ready UI/UX to improve trust and efficiency.
05
Real Estate
Intuitive property listing platforms with virtual tours, mortgage calculators, and CRM-integrated solutions for agents and buyers.
06
Logistics & Supply Chain
Web apps designed for real-time shipment tracking, automated inventory management, and predictive analytics for supply chain optimization.
Benefits of a Professionally Designed Web app

Why should you choose our
web app design agency?

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User-centric approach
We put your users at the heart of the design process. By conducting in-depth research, usability testing, and data-driven decision-making, we craft intuitive web apps that enhance user experience and drive conversions.
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Seamless collaboration & transparency
We integrate smoothly with your team, offering real-time updates, direct communication channels, and a collaborative workflow. This ensures you’re involved in every step, with full transparency and control over the process.
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Design with development in mind
Our designs are not just visually stunning—they are built for seamless implementation. We create scalable, development-ready designs that follow UX best practices, ensuring smooth integration, faster development cycles, and reduced rework.
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Mid-level and senior experts
Our team consists of seasoned web designers with 7+ years of experience, specializing in your industry. This expertise ensures your web app is strategically designed to meet both business goals and user expectations.
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Proven trust and high satisfaction
We prioritize long-term relationships and client satisfaction. With a 98% satisfaction rate, our commitment to quality, reliability, and results-driven design has made us a trusted partner for businesses worldwide.

OUR WEB APP INTERFACE DESIGN PROCESS

How our

web app agency

structures design to avoid rework and ship your product faster
Before you design screens, you need a system. We start with business logic, map real-world user behaviour, and design web apps that don’t need to be rebuilt six months later. Here’s how that looks.

Stakeholder interview

01

Defining your goals, users, and technical context

At our web app agency, we start with your goals, team structure, and tech context to shape how the product should work.Key steps

Key steps:

  • Business goals and platform vision
  • Internal workflows and technical setup
  • User types and access logic

Deliverables

Stakeholder brief product context summary

Market & user research

02

Grounding UX in category logic and user expectations

We review what similar tools are doing — and what users expect — to guide early layout, flow, and feature decisions.

Key steps:

  • Competitive UI/UX audit
  • Category-specific design benchmarks
  • Early user behavior mapping

Deliverables

UX audit competitor feature report trend snapshot

Feature breakdown

03

Defining what to design now—and what can wait

Together, we organize features by business value and feasibility to shape your mobile app and web deign MVP or V1 scope.

Key steps:

  • MVP vs. roadmap features
  • User-impact scoring
  • Release phasing plan

Deliverables

Feature map release pipeline product logic outline

Userflow & wireframes

04

Structuring how users navigate your web app

Our web app agency maps flows across user roles and creates wireframes that bring logic, layout, and interactions into focus.

Key steps:

  • End-to-end user journeys
  • Key screens by user type
  • Early interaction logic

Deliverables

Multi-role user flows navigation models screen wireframes

Visual direction & moodboarding

05

Setting the tone with focused web UI design services

We explore visual styles and UI tone to define what your product should look and feel like before full web design begins.

Key steps:

  • Colour, type, and spacing systems
  • Visual mood samples by industry
  • UI style cues mapped to product goals

Deliverables

Moodboard Design concepts

Mockups development

06

Designing all screens for dev-ready output

We deliver complete web application GUI design: every screen, state, and breakpoint built for clarity, consistency, and clean handoff.

Key steps:

  • Dev-aligned screen designs
  • Modular UI components
  • Variants for different screen sizes

Deliverables

Figma files with specs UI components dev-ready mockups

Testing & validation

07

Reviewing how the web-based app design performs before you build it

We test flows via clickable prototypes and refine web designs based on feedback from users and stakeholders.

Key steps:

  • Usability testing
  • Stakeholder reviews
  • UX adjustments before dev

Deliverables

Feedback report UX refinements flow fixes

Mockups hand-off

08

Supporting your team during build and QA

We prep final files, stay available for dev questions, and review what’s built to catch mismatches early.

Key steps:

  • Figma kits with tokens and specs
  • Dev walkthroughs if needed
  • Post-build UI checks

Deliverables

Dev specs component documentation QA support notes
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Ready to get a website that works, 
scales, and converts?

Featured Cases

Discover how we’re driving change through innovative projects, strong partnerships, and measurable outcomes.
#Product design
AIRES – AI-powered CRM for real estate
AIRES Icon - canadaCanada
Results

Enhanced sales efficiency

Unified platform for all users

Reduced development costs

#UX audit #Product redesign #web development
KlickEx – frictionless cross-border payments for the Pacific Island communities
Nomupay Icon - Clip path groupNew Zealand
Tech Stack

Next.js, TypeScript, React Redux

Timeline

6 months

Results

+35% "Add Money" conversion rate

+30% "Money Transfer" completion rate

Raised $1M in additional funding within 6 months

Image - Case preview

Izek Lal

Country manager

We have seen a significant improvement in terms of mobile friendliness and the general flow of the system. I believe this has contributed significantly to the growth of our business. Many thanks, Phenomenon.

#UX Audit #Product redesign #Web development #Team extention
Isora – optimizing governance, risk & compliance for top institutions
SaltyCloud Icon - fi_4628635Texas, USA
Tech Stack

React, Python, AWS

Timeline

12 months, ongoing

Results

2x faster user workflows

50% shorter time-to-market

Nominated for UX Design Award 2024

why chose us?

Your success is our
priority

Design that meets regulation
HIPAA- and GDPR-certified expertise for Healthcare and beyond.

Since 2019, we’ve gained HIPAA and GDPR certifications and industry recognition, delivering hundreds of products in Healthcare, SaaS, FinTech, and EdTech — where compliance and UX go hand in hand.

Design that lasts beyond trends
We don’t chase fads. We build digital products that stay relevant.

Our work looks sharp today and stays usable tomorrow — designed around long-term value, not short-term gimmicks. Scalable systems, brand consistency, and smart UX that grows with your product.

Design that’s developer-ready
We design for implementation, not handoff.

Every component is built with devs in mind: design tokens, accessibility, reusability, and real-world constraints. We collaborate with your team, reuse existing elements, and stay involved until everything’s live.

Local presence. Global delivery
Work directly with the doers — not a chain of account managers.

Collaborate with UX strategists in North America, while our senior design and development teams in Europe deliver fast, consistent results. We integrate into your tools and workflow, working as part of your team — from a single embedded designer to a full product squad.

what our clients say

5.0 is our average
on clutch & designrush

Image - Craig Tortolani

Craig Tortolani

CPO at Dekryption Labs
Image - Alex Friedman

Alex Friedman

CEO at Open Path

Not only is the team extremely communicative, their work is exceptional. I have never worked with a team so talented while also being competitively priced and communicative.

Image - KlickEx

KlickEx Team

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George Fry

Founder at Neap

The quality of the designs is fantastic. Phenomenon Studio works at speed and is extremely punctual with timelines. They deliver top-notch outcomes with exceptional designs.

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Andre Guerra

Co-Owner at RADCAT Design
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Kevin Alvarez

Founder & General Partner, Predictive

Phenomenon Studio's ability to translate concepts and rough design mock-ups into high-fidelity assets, designs, and visuals was very impressive. The goal was to maintain simple elegance in the design aesthetic, and they did it very well.

Awards
Wins that inspire us forward
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Top product design company 2024

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Top rated plus agency by Upwork

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Professional partner by Webflow

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Nominee 2024
Isora - GRC Platform

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Site of the Day & honorable mentions

32+
others
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FAQ

Questions already
answered
01
How to design a web app?

Designing a web app is a multifaceted process that requires a deep understanding of user needs, behaviors, and goals. It involves creating intuitive interfaces that are not only visually appealing but also functional, ensuring users can navigate the app easily and achieve their desired outcomes without frustration. Our web app UI design services take a user-centered approach, prioritizing usability, accessibility, and engagement. We focus on crafting designs that enhance the overall user experience by streamlining workflows, improving interaction design, and ensuring the app performs seamlessly across different devices and platforms.

02
What are web app design patterns?

Web app design patterns are standardized, reusable solutions to common design challenges that developers and designers face when building applications. These patterns provide a framework or guideline for addressing issues such as navigation, user input, data display, and interactivity. By using design patterns, teams can ensure a consistent and intuitive user experience across the application, while also streamlining the development process. They help reduce the time spent on solving recurring problems, promote best practices, and improve usability by following familiar design conventions. Examples include hamburger menus for navigation, modals for alerts or additional information, and infinite scrolling for content-heavy interfaces. Adopting design patterns can significantly enhance both the efficiency of development and the overall quality of the user experience.

03
Why is custom web app design important?

Custom web app design goes beyond a one-size-fits-all approach, tailoring the application to meet your specific business needs and goals. By focusing on your unique requirements, it ensures that every feature and functionality aligns with your objectives, improving efficiency and productivity. Additionally, custom design provides a personalized user experience that resonates with your target audience, making it easier to engage and retain customers. This distinct approach not only enhances usability but also helps differentiate your brand from competitors, giving you a competitive edge in the market. With custom web app design, you can create a solution that grows with your business and delivers long-term value.

04
How does web design for mobile apps differ from web apps?

Web design for mobile apps focuses primarily on creating interfaces that are optimized for touchscreens and smaller screens. This requires an emphasis on simplicity, large touch targets, and intuitive navigation to cater to mobile-specific user behaviors, such as swiping, tapping, and scrolling. Mobile app design also considers the limitations of mobile devices, like smaller processing power and screen size, ensuring the interface is lightweight and responsive. On the other hand, web app design encompasses a broader range of devices, including desktops, tablets, and smartphones. It needs to account for varying screen sizes, input methods (such as a mouse, keyboard, or touch), and device capabilities. This means web app designers often prioritize responsive design techniques, creating interfaces that adapt seamlessly to different screen sizes. Additionally, web apps may rely more heavily on browser interactions and require considerations for cross-browser compatibility and performance. In essence, while mobile app design is more narrowly focused, web app design demands flexibility to accommodate diverse user environments.

05
What is web app UI design?

Web app UI design is the process of creating the visual and interactive elements of a web application to ensure it is both functional and appealing to users. This involves designing layouts, typography, color schemes, buttons, and other interface components that make up the user experience. The goal is to create an intuitive design where users can easily navigate and interact with the application without confusion. A well-designed UI not only focuses on aesthetics but also prioritizes usability, accessibility, and responsiveness to provide a seamless experience across different devices and screen sizes. Ultimately, great web app UI design enhances user satisfaction and supports the app’s overall functionality.

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Kseniia Shalia
Account Executive
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Polina Chebanova
Co-Founder & CPO